Know Your Environment. Protect Your Health.

Nitrate

Edom Water Supply Corporation

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

12

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.112 ppm220.0289 ppm - 0.195 ppm
20190.111 ppm220.0364 ppm - 0.185 ppm
20200.0953 ppm220.0236 ppm - 0.167 ppm
20210.0319 ppm220.0293 ppm - 0.0344 ppm
20220.0959 ppm220.0357 ppm - 0.156 ppm
20230.152 ppm220.142 ppm - 0.162 ppm

ppm = parts per million

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.14 ppm

The EWG health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL): 10 ppm

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2018-04-02Q18131860090.0289 ppm
2018-04-02Q18131860140.195 ppm
2019-07-01Q19411970010.185 ppm
2019-07-01Q19411970020.0364 ppm
2020-02-03Q20041500040.0236 ppm
2020-04-07Q20143290060.167 ppm
2021-07-12Q21180550110.0293 ppm
2021-07-12Q21180550120.0344 ppm
2022-10-20Q22319230070.156 ppm
2022-10-20Q22319230080.0357 ppm
2023-08-30Q23375540090.162 ppm
2023-08-30Q23375540100.142 ppm